PLEASE NOTE 'Shurtape PC-21F' is out of stock and not currently available for purchase on the site.
Shurtape PC-21F Flame Retardant Cloth Cargo Pit Duct Tape [Discontinued]
Please note that Shurtape has discontinued PC-21F and no inventory now remains in inventory. Please see Polyken 225FR for an alternative.
Shurtape PC-21F Flame Retardant Cloth Duct (Cargo Pit) Tape is a specialty grade duct tape used in the aerospace industry to seam, seal, and repair cargo compartment liners, and cover pins and rivets. Adheres well to steel, fiberglass, and plastic. Also used in the HVAC industry where federal, state and local building codes require a flame retardant cloth duct tape and in automotive and OEM markets. Shurtape PC 21F has excellent conformability; resists curling; is hand tearable; and will not support flame spread. Printed message says "Shurtape PC 21F F.A.R. 25.853."
Shurtape PC-21F Flame Retardant Cloth Cargo Pit Duct Tape
- Adhesive: flame retardant natural rubber How are adhesives different?
- Carrier/Backing: waterproof, polyethylene film with a polyester cloth carrier
- Thickness: 13 mils (carrier, adhesive) What is mil thickness?
- Adhesion: 36 ounces per inch (to stainless steel test panel)
- Tensile Strength: 28 pounds per inch (longitudinal)
- Service/Operating Temperature: 50°F to 200°F
- Elongation: 20%
- Flame Spread Index: 5
- Smoke Development Index: 15
- Standards Met: UL 723; FAR 25.853
- Core: 3" diameter
Note: Specifications are those given by manufacturers and are not tested for accuracy.
Please note that tape rolls are NOT guaranteed to be splice-free. Tape rolls are typically cut to standard tape industry metric-cut sizes - or approx 5% narrower than the nominal size (i.e. 24mm per 1-inch of nominal width ordered).
hot melt rubber (synthetic)
Offers the widest range of application flexibility available. Exhibits excellent processing performance whether manually or automatically applied. Has superior tensile strength, adhesion properties and holding force which ensures consistent, reliable seals. Hot melt adhesive will bond faster to a surface which is referred to as quick-grab or quick-stick. It typically has higher tack (will feel stickier to the touch), but is also softer. It has lower heat resistance, shear resistance, and sometimes UV resistance than an acrylic adhesive. NOTE: it is called hot melt because the adhesive is applied hot by the manufacturer and then hardens as it cools (you do not need to apply heat to the tape yourself).
Properties are similar to that of hot melt rubber, but natural rubber often holds where other adhesives won't (recycled fibers, dust, cold, heat and heavy loads). It provides good overall adhesion and moisture resistance.
Offer excellent performance, especially for applications in temperatures less than 40°F and greater then 120°F. It provides excellent clarity, has high shear strength, is usually more permanent/durable even when exposed to moisture, and it ages well over extended periods in fluorescent and sunlight. Since it remains clear for the life of the application and does not yellow over time it is ideal for applications such as sealing white cartons. While it has good initial adhesion it does take 24-48 hours to cure and to achieve its maximum bond strength (has gradual adhesion buildup). Another difference between hot melt rubber and acrylic adhesive is if you fold tape over making the two adhesive sides touch the acrylic adhesive will remain attached to the carrier (e.g. paper, film) while a hot melt adhesive will stick to itself and pull off of the carrier. It is the best choice for clarity, UV resistance and aging characteristics.
Is great for extreme temperature applications since silicone adhesive can work in continuous operating temperatures from -100°F to 500°F. They also exhibit good chemical resistance, retain electrical properties, and remove cleanly with little or no residue.
Zinc oxide based adhesive formula is a skin-friendly adhesive which is commonly used on sports medicine tapes.
Thickness, AKA caliper or gauge, refers to the distance from one surface of a tape backing, or adhesive, to the other.
1 mil = 1/1000 of an inch
Examples: 1/16 inch = 62.5 mils; 1/32 inch = 31.25 mils